Improvement in nails for sole-fastenings



L GODDU. Nails for Sule- Fastenings.

NO.\9,257. Patented 0ct.26,1875.

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PLPETERS, PHOTO-LIHQGHAPHER. WASHINGTON. DAL

UNITED ySTAras PATElvT OFFICE..-

LOUIS GODDU, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE AMERICANCABLE-SOREW-WIRE COMPANY, OF SAME PLAGE.'

IMPROVEMENT IN N'AILS FOR SOLE-FASTENI'NGS.

Specification formingpart of Letters Patent No. 169,257, dated October26, 1875 lapplicationy filed September 20, 1875.

CASE A.

ton, in the county of Suffolk and State of Massachusetts, have inventedcertain new and useful Improvements in Nails for Sole-Fastenings; and Ido hereby declare that the following is a full, clear, and exactdescription thereof, which will enable others skilled in the art towhich it pertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

My invention relates to the construction of nails designed principallyto be used in the manufacture of boots and shoes, and to be driveneither by hand or machine, and with or without the use of an awl.

Nails made for the purpose of uniting soles to uppers of boots and shoeshave been made of various shapes, and possessing more or less utility.

It is believed by those conversant with this branch of industry that nonail patented prior to this possesses all the essential qualities neededto make a perfect nail.

A nail, to be what is required, should possess, among other things, thefollowing essential features: First, it should be capable of beingdriven, if desired, without any hole being first made by an awl; or, ifthe hole is made, it need be only very small. It should have anindeinite clinching-point, great holding power, and show a perfect headafter being driven.

My design is to produce a better nail as a sole-fastening than any thathas yet, to my knowledge, been used in the trade. In carrying out thisobject I prefer, for this purpose, a cylindrical nail, because it iseasier made, and this shape being preferable in the iinish ofa boot orshoe. I do not use, in this nail, av

shouldered head to prevent its Working into the foot when the 4shoe sbeing worn. I obtain a symmetrical head, however, by leaving' the nailthe full thickness' of the Wire at its 4largest end, and slightly convexon its headsurface, from which point a symmetrical taper is formed,terminating at the other end of the nail at a point in direct line withthe center of the head. On the surface of the shank I form a series ofcorrugations or grooves, or, if desired, a series of short combs,formin-g a rack of horizontal parallel circular lIins, commencing at ornear the head of the nail. These corrugations extend to the extremepoint, as near as practicable, the depth and size of these corrugationsbeing preferably deeper and broader near the head, and diminishing insize as they come near the point.

The leather embeds itself easily into, the corrugations, no violentdisruption of the ber being caused by driving the nail, while itstaperin g conical point allows it to clinch easily and perfectly,whether it is driven through a sixteenth or quarter of an inch, or evenmore.

This nail holds equally well, whether it has a long or short clinch, andif driven so that the point barely comes through, without any clinch atall, it is almost impossible to draw it out. Corrugations are farpreferable to a thread as a holding device, from the fact that no amountof turning in any direction serves to disengage the nail from its holdon the leather, which is not the case With the screwthread.

This nail is driven with less power, maintains-its vertical directionthrough the leather, has a stronger clinch, of more indefinite extent,greater holding power, and more symmetrical head, than any nail which Ihave ever seen.

I make the nail slightly convex on its headsurface, so that the blows,by driving, shall not destroy the perfect symmetry of the head, butleave, after finishing, a perfectly spherical head.

` The drawings show such a nail in elevation, A; an enlarged viewthereof, B. C shows a l nail, with corrugations covering the entiresurfaces of the shank; D, an enlarged view thereof 5 E, a nail drivenand clinched in a piece of leather; F, a nail driven Without beingclinched.

I have searched for nails possessing the qualities` aforestated., and,not being able to `find any, I believe they are notl inV use, and

that my nail is new to the trade.`

A I have described my nail with special reference to sole-fastenings. Itis, however, equal-ly applicable for uniting ditferent layers of`leatherfor pouches, hose, V86e., as well as articles of .paper andWood. l

The indefinite clinching-point is obtained by having it symmetrical withthe shank of the nail, which, being of cylindrical tapering `form, willclinch at the point, without regard to any particular extent ofprojection of such point beyond the surface of the stock into which itmay be driven.

The corrugations may be horizontal grooves of the form shown in B and(l, or truncated cones or fins, as maybe deemed best; but the spacesbetween the cones or fins must de- I claim- 1. A` shoe-nail consistingof a cylindrical y bead, conical shank, and la series ot' horizontalparallel grooves or corrugations, extending from the base of the head tothe point of the nail.

2. In a boot or shoe nail, the combination of a cylindrical head, havinga spherical surface, a conical shank, terminating at a point in linewith the center of the head, and horizontal parallel grooves orcorrugations, with a clinching-point of indefinite length symmet ricalwith the conicalbody. l

3. In a boot or shoe nail, theigrooves or corrugations, diminishing indepth and width from the head to the point of a cylindrical taperingbody.

In testimony that I claim the foregoing I have hereunto axedmy signaturein presence of two Witnesses.

LOUIS connu.

